How do they differ from residential wiring?
Commercial and industrial wiring make extensive use of conduit, cable trays/ This entails explosion-proof or flame-proof fittings, along with the seals and other conduit fittings. Residential wiring, in most cases make extensive use of romex cables without any conduit. Other than these major and a few minor differences, the wiring is actually the same. This is the installation of cables/wires from the circuit breakers to the users. TexMav
